Changes (ep): + For v5rc: Set category context to WWPDB_LOCAL for pdbx_version, database_PDB_rev and database_PDB_rev_record + Add ssbond to enumeration for pdbx_data_processing_status.status + Set WWPDB_LOCAL context for em_2d_crystal_entity.c_sampling_length in v5_next but not v5rc.

Allowed characters for use in symmetry operation such as 1/2-x,y,1/2-z

symop

char

([1-9]|[1-9][0-9]|1[0-8][0-9]|19[0-2])(_[1-9][1-9][1-9])?

symop item types take the form n_klm, where n refers to the symmetry operation that is applied to the coordinates in the ATOM_SITE category identified by _atom_site_label. It must match a number given in _symmetry_equiv_pos_site_id.

k, l, and m refer to the translations that are subsequently applied to the symmetry transformed coordinates to generate the atom used. These translations (x,y,z) are related to (k,l,m) by k = 5 + x l = 5 + y m = 5 + z By adding 5 to the translations, the use of negative numbers is avoided.